KR – Page 23 – TechConnect Briefs

Removal of 10-nm contaminant particles from a wafer surface with supersonic CO2 particle beam

Kim E-J, Kim I-H, Kim E-J, Kim I-H, Lee J.W., POSTECH, KR

Contaminant control is becoming a major issue of nano-scale devices. Cryogenic aerosol beam using micron-sized aerosol particles has long been successfully used to remove contaminant particles (CPs) down to 50nm, and supersonic particle beam using [...]

Increased Sensitivity of Carbon Nanotube Sensors by Forming Stable and Low Resistance CNT/metal Electrode

Jeon D., Park D., Lee S., Seoul National University, KR

We fabricated a rigid and low resistance contact for CNT by utilizing a eutectic mixture melting at low temperature as an electrode. The fabrication was done by depositing a eutectic Au/Al thin film on the [...]

A field-emission X-ray source using an anisotropically focused electron beam

Jung S., Kim D., Seol S.K., Korea Electrotechnology Research Institute, KR

A field-emission X-ray source for dental imaging with an anode voltage of 70 kV and an anode current of more than 1 mA was designed and assembled using an anisotropically focused electron beam. With up [...]

Electromagnetic wave shielding effectiveness of SWNT-coated, transparent, conducting panels

Nam I.W., Lee H.K., Sim J.B., Choi S.M., KAIST, KR

Needs for electromagnetic wave shielding/absorbing have been increased in order to prevent electromagnetic interference, eavesdropping, and harmful effects to human bodies (Chung, 2001; Kim and Lee, 2008). Single-walled carbon nanotubes (SWNTs) have been well-known for [...]

Uniqueness of intraband plasmon dispersion of a single layer graphene

Shin S.Y., Hwang C.G., Sung S.J., Lee P.L., Kim J.G., Kim N.D., Kim J.G., Kim N.D., Chung J.W., Pohang University of Science and Technology, KR

we studied the dispersion of intraband plasmon excitation of a single layer graphene(SLG) formed on 6H-SiC(0001) surface by using high-resolution electron energy loss spectroscopy. The dispersion w(q) measured from SLG appears to be quite different [...]

A Study on Fabrication of Cellulose Nanofibers in Water

Kim K-Y, Jeong W.-Y., Lim D.-Y., Korea Institute of Industrial Technology, KR

Cellulose nanofibers (CNFs) were successfully fabricated by fibrillation of wood pulp cellulose into submicron and/or nanoscale nanofibers with a microfluidizer in water solution. CNFs have the great potential as reinforcing materials for polymeric composite materials. [...]

Role of Hard Segment Induced Nanosized Domain on Concentrated Solutions and Bulk Properties

Lem K.W., Lee D.S., Haw J.R., Song G.S., Curran S., Sund S., Iqbal Z., Brumlik C., Konkuk University, KR

When a film is cast from solution, the volume fraction of polymer in the film increases with increasing drying temperature and/or time. Its viscoelastic behavior transitions from more viscous (where G” > G’) in dilution [...]

Structural and Mechanical Changes in Heart Mitochondria of Rat by AFM

Lee G.J., Lee J.W., Chae S.-J., Kang S-W, Lee G.J., Lee J.W., Ha S.J., Kim W., Kim Y., Kim W., Kim Y., Park H.K., Kyung Hee University, KR

Mitochondria play critical roles in both the life and death of cardiac myocytes. Various factors such as loss of ATP synthesis and increase of ATP hydrolysis, impairment in ionic homeostasis, formation of reactive oxygen species [...]

A Permselective Layered Silicate Modified by Acid-treatment and Its Use for Blocking of Methanol Crossover in DMFC

Yoo H., Kim J.H., Kwak S-Y, Seoul National University, KR

Layered silicates currently find uses in ion-exchange, adsorption, catalysis and fabrication of nanocomposites. Several layered silicates have channel systems or open frameworks within layers. They can be used to solve the problem for direct methanol [...]

Charge/Discharge Property and Cycle Life of Li4Ti5O12/LiCoO2-LiNi1-x-yCoxAlyO2 Cell for Electricity Storage Applications: Effect of Cell Design Parameters

Song M.-S., Samsung Advanced Institute of Technology, KR

In this work, Li4Ti5O12 has been used as an anode material in lithium-ion batteries for electricity storage applications, which operate under intermittent cycling conditions with higher charge/discharge rates than 4C (i.e., current extracting the full [...]